A battery for improving the endurance of an electric vehicle

Abstract

The present invention provides a battery for improving the endurance of an electric vehicle, which includes a mounting plate, a battery cell, a protective case, a liquid cooling system and a main control unit. The liquid cooling system includes a coolant storage tank, a liquid outlet pump, a liquid inlet pump, a U-shaped pipeline, a converging pipe, a liquid return pipe, an interpenetrating pipe, a connecting pipe, a solenoid valve, a first electric slide table, a first telescopic pipe, a docking pipe and a docking mechanism. According to the different temperatures of the battery cells, the first electric slide table can drive the docking pipe to move to one side of the connecting pipe at different positions, and then the docking mechanism can dock the docking pipe and the connecting pipe. The coolant in the coolant storage tank can enter the U-shaped pipeline through the first telescopic pipe, the docking pipe and the connecting pipe under the action of the liquid outlet pump. The connecting pipes are correspondingly arranged on both sides of each interpenetrating pipe. Therefore, the coolant can preferentially enter the interpenetrating pipe to preferentially cool the battery cells with higher temperatures, ensuring that the temperatures of the battery cells will not be too high, thereby ensuring the discharge performance of the entire battery pack and improving the endurance ability.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and particularly to a battery for improving the endurance of electric vehicles. Background Art

[0002] With the transformation of the global energy structure and the enhancement of environmental protection awareness, electric vehicles have become an important development direction in the automotive industry and tend to replace traditional fuel vehicles. The main difference between electric vehicles and traditional fuel vehicles is that traditional fuel vehicles supply power by burning fuel, while electric vehicles provide power through batteries. Therefore, the performance of the battery system directly affects the endurance and market competitiveness of electric vehicles. All along, the endurance of electric vehicles has been the main development direction of vehicle manufacturers. In addition to expanding the battery capacity, major manufacturers have been working on the battery itself and its surrounding structures, including optimizing the chassis layout, structural integration, improving the cooling system, and reducing battery energy consumption. At present, the cooling systems of electric vehicle batteries are mainly divided into air-cooled cooling and liquid-cooled cooling. Air-cooled cooling drives air flow through a cooling fan to make the air pass through the gaps between the battery cells to drive away heat, while liquid-cooled cooling is to install cooling pipes between the battery cells and take away heat through the flow of the coolant in the cooling pipes. Compared with air-cooled cooling, liquid-cooled cooling has higher efficiency and higher temperature control accuracy. However, in actual use, there are still some problems with the liquid-cooled cooling system of the battery. The flow of the coolant basically follows a fixed path, and there is a temperature difference between the battery cells at different positions. The coolant cannot flow through the battery cells with higher temperatures for priority cooling, resulting in differences in the cooling effects of the battery cells, and some battery cells still have higher temperatures, thus affecting the endurance of the battery. Summary of the Invention

[0003] In view of this, the present invention provides a battery for improving the endurance of electric vehicles, which can adjust the flow path of the coolant according to the heat generation situation to facilitate the priority cooling of the battery cells with higher temperatures and improve the endurance of the battery.

[0004] The technical solution of the present invention is realized as follows:

[0005] A battery for improving the endurance of an electric vehicle, including a mounting plate, battery cells, a protective case, a liquid cooling system, and a main control unit. The protective case and the main control unit are both arranged on the bottom surface of the mounting plate. The battery cells are arranged in an array inside the protective case. The liquid cooling system includes a coolant storage tank, an outlet pump, an inlet pump, a U-shaped pipeline, a converging pipe, a return pipe, an interpenetrating pipe, a connecting pipe, a solenoid valve, a first electric slide table, a first telescopic pipe, a docking pipe, and a docking mechanism. The coolant storage tank is arranged on the bottom surface of the mounting plate. The outlet pump is arranged on the opposite side wall of the coolant storage tank. The inlet pump is arranged on the side wall of the coolant storage tank facing the protective case. The U-shaped pipeline is closely attached to the inner side wall of the protective case and encloses all the battery cells inside. The two ends of the U-shaped pipeline extend outside the protective case and are connected to the converging pipe. One end of the return pipe is connected to the converging pipe, and the other end is connected to the inlet pump. The interpenetrating pipe is arranged in the protective case and is located between different rows of battery cells. The two sides of the interpenetrating pipe are connected to the U-shaped pipeline. The connecting pipe is arranged on the outer side wall of the protective case, and its end extends into the protective case and is connected to the U-shaped pipeline. The solenoid valve is arranged on the connecting pipe. The axis of the interpenetrating pipe coincides with the axis of the connecting pipe. The first electric slide tables are oppositely arranged on the bottom surface of the mounting plate. The protective case is located between the first electric slide tables. The docking pipe is arranged on the bottom surface of the mover of the first electric slide table. The first telescopic pipe connects the outlet pump and the docking pipe. The connecting pipe is located on one side of the moving path of the docking pipe. The docking mechanism is used to drive the docking pipe to dock with the connecting pipe. The main control unit is electrically connected to the outlet pump, the inlet pump, the solenoid valve, the first electric slide table, and the docking mechanism respectively.

[0006] Preferably, the docking pipe includes a fixed pipe, a second telescopic pipe, and a moving pipe. The docking mechanism includes a force-bearing plate and an electric push rod. The fixed pipe is arranged on the bottom surface of the mover of the first electric slide table. The first telescopic pipe is connected to the fixed pipe. The fixed pipe, the second telescopic pipe, and the moving pipe are connected in sequence. The force-bearing plate is arranged on the outer wall of the moving pipe. The electric push rod is arranged on the bottom surface of the mover of the first electric slide table, and its output shaft is connected to the side wall of the force-bearing plate. The outer wall diameter of the moving pipe is smaller than the inner wall diameter of the connecting pipe. The main control unit is electrically connected to the electric push rod.

[0007] Preferably, the docking mechanism further includes an air pump, an air delivery pipeline, and an annular airbag. The air pump is arranged on the top surface of the moving pipe. The annular airbag is arranged on the outer wall of the moving pipe. The air delivery pipeline connects the air pump and the annular airbag. The main control unit is electrically connected to the air pump.

[0008] Preferably, the docking mechanism further includes an air release pipe and an air valve. The air release pipe is connected to the air delivery pipeline. The air valve is arranged on the air release pipe. The main control unit is electrically connected to the air valve.

[0009] Preferably, the docking mechanism further includes a transmitting tube and a receiving tube. The receiving tube is arranged on the side wall of the force-bearing plate away from the electric push rod. The transmitting tubes are symmetrically arranged on the outer wall of the connecting tube and are located on one side of the moving path of the receiving tube. The main control unit is electrically connected to the transmitting tube and the receiving tube respectively.

[0010] Preferably, the liquid cooling system further includes a heat exchanger. The heat exchanger is arranged on the bottom surface of the mounting plate. The liquid return pipe is connected to the liquid inlet pump through the heat exchanger.

[0011] Preferably, it further includes a temperature sensor. The temperature sensor is arranged inside the protective shell and between the battery cells. The main control unit is electrically connected to the temperature sensor.

[0012] Preferably, it further includes a self-checking mechanism. The self-checking mechanism includes a horizontal electric slide table, a vertical electric slide table and a heating sheet. There is a receiving cavity arranged on the top surface of the mounting plate. The top of the protective shell is a heat-conducting silica gel plate. The heat-conducting silica gel plate is located below the receiving cavity. The vertical electric slide tables are oppositely arranged on the side walls of the receiving cavity. Both sides of the horizontal electric slide table are connected to the side walls of the moving parts of the vertical electric slide tables. The heating sheet is arranged on the bottom surface of the moving part of the horizontal electric slide table and is in contact with the heat-conducting silica gel plate. The main control unit is electrically connected to the horizontal electric slide table, the vertical electric slide table and the heating sheet respectively.

[0013] Preferably, the self-checking mechanism further includes a liquid flow sensor. The liquid flow sensor is arranged inside the connecting pipe. The main control unit is electrically connected to the liquid flow sensor.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] ① Place the protective shell and the coolant storage tank at the bottom of the mounting plate. After arranging the battery cells in the protective shell, the mounting plate can be installed on the vehicle chassis. By adjusting the mounting plate, it can be applicable to different vehicle chassis, improving the convenience of assembly;

[0016] ② The battery cells are arranged in an array in the protective shell. There are insertion tubes arranged between adjacent rows of battery cells. Both ends of the insertion tubes are connected to the U-shaped pipeline. The coolant in the coolant storage tank can be pumped out by the liquid outlet pump and input into the connecting pipe through the first telescopic pipe and the docking pipe. The coolant can flow into the insertion tubes and the U-shaped pipeline to cool the battery cells. Then the coolant can be pumped back to the coolant storage tank by the liquid inlet pump through the converging pipe and the liquid return pipe to achieve circulating cooling;

[0017] ③ There are multiple connecting pipes. A first electric slide is provided on one side of the connecting pipes. The first electric slide can drive the docking pipe to move to the side of different connecting pipes, and then the docking pipe and the connecting pipe can be docked through the docking mechanism, so as to realize the adjustment of the coolant inlet position, facilitate the priority cooling of the hotter battery cells, and improve the battery's endurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only the preferred embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic bottom view structure diagram of a battery for improving the endurance of an electric vehicle according to the present invention;

[0020] Figure 2 is Figure 1 an enlarged view of part A in

[0021] Figure 3 It is a schematic connection structure diagram of the protective case and the bottom plate of a battery for improving the endurance of an electric vehicle according to the present invention;

[0022] In the figure, 1 is the mounting plate, 2 is the battery cell, 3 is the protective case, 4 is the main control unit, 5 is the coolant storage tank, 6 is the liquid outlet pump, 7 is the liquid inlet pump, 8 is the U-shaped pipeline, 9 is the converging pipe, 10 is the return pipe, 11 is the insertion pipe, 12 is the connecting pipe, 13 is the solenoid valve, 14 is the first electric slide, 15 is the first telescopic pipe, 16 is the docking pipe, 17 is the fixed pipe, 18 is the second telescopic pipe, 19 is the moving pipe, 20 is the stress plate, 21 is the electric push rod, 22 is the air pump, 23 is the air delivery pipeline, 24 is the annular airbag, 25 is the air release pipe, 26 is the air valve, 27 is the emission pipe, 28 is the receiving pipe, 29 is the heat exchanger, 30 is the temperature sensor, 31 is the horizontal electric slide, 32 is the vertical electric slide, 33 is the heating sheet, 34 is the accommodation cavity, 35 is the heat conductive silica gel plate, 36 is the liquid flow sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to better understand the technical content of the present invention, a specific embodiment is provided below, and the present invention will be further described in conjunction with the drawings.

[0024] See Figures 1 to 3, a battery for improving the endurance of an electric vehicle provided by the present invention, includes a mounting plate 1, battery cells 2, a protective shell 3, a liquid cooling system, and a main control unit 4. The protective shell 3 and the main control unit 4 are both arranged on the bottom surface of the mounting plate 1. The battery cells 2 are arranged in an array inside the protective shell 3. The liquid cooling system includes a coolant storage tank 5, a liquid outlet pump 6, a liquid inlet pump 7, a U-shaped pipeline 8, a converging pipe 9, a return pipe 10, an interpenetrating pipe 11, a connecting pipe 12, a solenoid valve 13, a first electric slide 14, a first telescopic pipe 15, a docking pipe 16, and a docking mechanism. The coolant storage tank 5 is arranged on the bottom surface of the mounting plate 1. The liquid outlet pump 6 is arranged on the side wall opposite to the coolant storage tank 5. The liquid inlet pump 7 is arranged on the side wall of the coolant storage tank 5 facing the protective shell 3. The U-shaped pipeline 8 is closely attached to the inner side wall of the protective shell 3 and encloses all the battery cells 2 inside. Both ends of the U-shaped pipeline extend outside the protective shell 3 and are connected to the converging pipe 9. One end of the return pipe 10 is connected to the converging pipe 9, and the other end is connected to the liquid inlet pump 7. The interpenetrating pipe 11 is arranged in the protective shell 3 and is located between different rows of battery cells 2. Both sides of the interpenetrating pipe 11 are connected to the U-shaped pipeline 8. The connecting pipe 12 is arranged on the outer side wall of the protective shell 3, and its end extends into the protective shell 3 and is connected to the U-shaped pipeline 8. The solenoid valve 13 is arranged on the connecting pipe 12. The axis of the interpenetrating pipe 11 coincides with the axis of the connecting pipe 12. The first electric slides 14 are oppositely arranged on the bottom surface of the mounting plate 1. The protective shell 3 is located between the first electric slides 14. The docking pipe 16 is arranged on the bottom surface of the mover of the first electric slide 14. The first telescopic pipe 15 connects the liquid outlet pump 6 and the docking pipe 16. The connecting pipe 12 is located on one side of the moving path of the docking pipe 16. The docking mechanism is used to drive the docking pipe 16 to dock with the connecting pipe 12. The main control unit 4 is electrically connected to the liquid outlet pump 6, the liquid inlet pump 7, the solenoid valve 13, the first electric slide 14, and the docking mechanism respectively.

[0025] The mounting plate 1 is used to be mounted on the bottom plate of a new energy vehicle. A coolant storage tank 5 and a protective shell 3 are arranged on the bottom surface of the mounting plate 1. The battery cells 2 are arranged in an array in the protective shell 3. A U-shaped pipeline 8 is arranged in the protective shell 3. The outer wall of the U-shaped pipeline 8 is in close contact with the inner wall of the protective shell 3. The battery cells 2 are located between the U-shaped pipelines 8. The battery cells 2 are of a multi-row structure. An interpenetrating pipe 11 is arranged between adjacent rows of battery cells 2. Both ends of the interpenetrating pipe 11 are connected to the U-shaped pipeline 8. The two ends of the U-shaped pipeline 8 extend to the outside of the protective shell 3 and are connected to a converging pipe 9. A liquid return pipe 10 is arranged in the middle of the converging pipe 9. The liquid return pipe 10 is connected to the coolant storage tank 5 through a liquid inlet pump 7. Liquid outlet pumps 6 are arranged on both sides of the coolant storage tank 5. The liquid outlet pumps 6 can extract the coolant in the coolant storage tank 5. A first telescopic pipe 15 is arranged at the outlet of the liquid outlet pump 6. The first telescopic pipe 15 is connected to a docking pipe 16. A first electric sliding table 14 can drive the docking pipe 16 to move. A number of connecting pipes 12 are arranged on the outer wall of the protective shell 3. The number of the connecting pipes 12 on the same side is the same as the number of the interpenetrating pipes 11. And the ends of the connecting pipes 12 extend into the protective shell 3 and are connected to the U-shaped pipeline 8. At the same time, the axis of the interpenetrating pipe 11 coincides with the axis of the connecting pipe 12. When the docking pipe 16 moves to one side of the connecting pipe 12, a docking mechanism can dock the docking pipe 16 with the connecting pipe 12. The coolant extracted by the liquid outlet pump 6 can enter the U-shaped pipeline 8 through the connecting pipe 12. The coolant will flow through the U-shaped pipeline 8 and the interpenetrating pipe 11. While flowing, it will take away the heat generated by the battery cells 2. The coolant after heat exchange will flow out from both ends of the U-shaped pipeline 8 and be pumped back to the coolant storage tank 5 through the converging pipe 9 and the liquid return pipe 10 by the liquid inlet pump 7 to achieve circulating liquid cooling and avoid the battery cells 2 having too high a temperature and affecting the charge and discharge performance.

[0026] And since the docking pipe 16 can move, solenoid valves 13 are arranged on all the connecting pipes 12, which can control one of the connecting pipes 12 on the same side to be opened, and the other connecting pipes 12 are in a closed state. When there is a situation of uneven temperature among the battery cells 2 in the protective shell 3, the docking pipe 16 can move to both sides of the interpenetrating pipe 11 where the battery cells 2 with higher temperature are located. Then, after the docking pipe 16 is docked with the connecting pipe 12, the coolant will preferentially flow into the interpenetrating pipes 11 on both sides of the battery cells 2 with higher temperature to achieve preferential cooling of the battery cells 2 with higher temperature, ensure the performance of the entire battery, and improve the battery endurance.

[0027] Preferably, the docking tube 16 includes a fixed tube 17, a second telescopic tube 18 and a movable tube 19, the docking mechanism includes a force plate 20 and an electric push rod 21, the fixed tube 17 is arranged on the bottom surface of the mover of the first electric slide 14, the first telescopic tube 15 is connected to the fixed tube 17, the fixed tube 17, the second telescopic tube 18 and the movable tube 19 are connected in sequence, the force plate 20 is arranged on the outer wall of the movable tube 19, the electric push rod 21 is arranged on the bottom surface of the mover of the first electric slide 14, and its output shaft is connected to the side wall of the force plate 20, the outer wall diameter of the movable tube 19 is smaller than the inner wall diameter of the connecting tube 12, and the main control unit 4 is electrically connected to the electric push rod 21.

[0028] When the docking tube 16 moves to one side of the connecting tube 12, the electric push rod 21 can push the force plate 20 to move, and the force plate 20 can drive the moving tube 19 to move toward the connecting tube 12, and finally insert the moving tube 19 into the connecting tube 12 to achieve docking, and the coolant extracted by the liquid outlet pump 6 can be input into the connecting tube 12 through the first telescopic tube 15, the fixed tube 17, the second telescopic tube 18 and the moving tube 19 to achieve fixed-point delivery of the coolant, and the setting of the second telescopic tube 18 can ensure that the moving tube 19 and the connecting tube 12 are accurately docked.

[0029] Preferably, the docking mechanism also includes an air pump 22, an air pipeline 23 and an annular airbag 24, the air pump 22 is arranged on the top surface of the moving tube 19, the annular airbag 24 is arranged on the outer wall of the moving tube 19, the air pipeline 23 connects the air pump 22 and the annular airbag 24, the main control unit 4 is electrically connected to the air pump 22, the docking mechanism also includes an air release pipe 25 and an air valve 26, the air release pipe 25 is connected to the air pipeline 23, the air valve 26 is arranged on the air release pipe 25, and the main control unit 4 is electrically connected to the air valve 26.

[0030] In order to prevent the coolant from overflowing from the connection between the moving tube 19 and the connecting tube 12, an annular airbag 24 is arranged on the outer wall of the moving tube 19. When the moving tube 19 is extended into the connecting tube 12, the air pump 22 can be turned on, and the air pump 22 will deliver external air to the annular airbag 24 through the air supply pipe 23. After the annular airbag 24 is inflated, the gap between the outer wall of the moving tube 19 and the inner wall of the connecting tube 12 can be sealed to prevent the coolant from overflowing. After the cooling work is completed, the air valve 26 can be opened, and the air in the annular airbag 24 can be discharged to the outside through the air supply pipe 23 and the air valve 26. After the annular airbag 24 shrinks, the moving tube 19 can be smoothly withdrawn from the connecting tube 12.

[0031] Preferably, the docking mechanism further includes a transmitting tube 27 and a receiving tube 28. The receiving tube 28 is arranged on the side wall of the force-bearing plate 20 away from the electric push rod 21. The transmitting tubes 27 are symmetrically arranged on the outer wall of the connecting tube 12 and are located on one side of the moving path of the receiving tube 28. The main control unit 4 is electrically connected to the transmitting tube 27 and the receiving tube 28 respectively.

[0032] When the first electric sliding table 14 drives the docking tube 16 to dock with the connecting tube 12, it is necessary to ensure that the positions of the moving tube 19 and the connecting tube 12 are accurately opposite. Therefore, transmitting tubes 27 are arranged on the outer wall of the connecting tube 12 relatively, and receiving tubes 28 are arranged on the two side walls of the force-bearing plate 20. When the centers of the moving tube 19 and the connecting tube 12 are completely aligned, the receiving tubes 28 on both sides can receive the infrared light emitted by the transmitting tube 27. After setting the frequencies of the transmitting tubes 27 in different forms, it can be determined on which side of which connecting tube 12 the moving tube 19 is located, so as to position the position of the moving tube 19.

[0033] Preferably, the liquid cooling system further includes a heat exchanger 29. The heat exchanger 29 is arranged on the bottom surface of the mounting plate 1. The return liquid pipe 10 is connected to the liquid inlet pump 7 through the heat exchanger 29.

[0034] The temperature of the coolant after heat exchange will increase. After flowing into the return liquid pipe 10 through the converging pipe 9, it will flow into the heat exchanger 29. The coolant exchanges heat with the external air in the heat exchanger 29, and the coolant with reduced temperature can return to the coolant storage tank 5 for storage, so as to perform circulating cooling.

[0035] Preferably, it further includes a temperature sensor 30. The temperature sensor 30 is arranged in the protective shell 3 and is located between the battery cells 2. The main control unit 4 is electrically connected to the temperature sensor 30.

[0036] The temperature sensor 30 is used to detect the temperature of the battery cells 2, so as to obtain the positions of the battery cells 2 with higher temperatures, so as to perform liquid cooling and heat dissipation at the corresponding positions of the docking tube 16.

[0037] Preferably, it further includes a self-checking mechanism. The self-checking mechanism includes a horizontal electric sliding table 31, a vertical electric sliding table 32 and a heating sheet 33. A receiving cavity 34 is arranged on the top surface of the mounting plate 1. The top of the protective shell 3 is a heat-conducting silica gel plate 35. The heat-conducting silica gel plate 35 is located below the receiving cavity 34. The vertical electric sliding tables 32 are relatively arranged on the side walls of the receiving cavity 34. Both sides of the horizontal electric sliding table 31 are connected to the side walls of the moving parts of the vertical electric sliding tables 32. The heating sheet 33 is arranged on the bottom surface of the moving part of the horizontal electric sliding table 31 and is in contact with the heat-conducting silica gel plate 35. The main control unit 4 is electrically connected to the horizontal electric sliding table 31, the vertical electric sliding table 32 and the heating sheet 33 respectively.

[0038] To ensure that the docking pipe 16 can accurately move to one side of the corresponding connecting pipe 12, the present invention is provided with a self-check mechanism. A receiving cavity 34 is provided at the top of the protective shell 3, and a self-check mechanism is arranged in the receiving cavity 34. Among them, the vertical electric slide 32 can drive the horizontal electric slide 31 to move vertically, and the horizontal electric slide 31 can drive the heating sheet 33 to move horizontally. Driven by the vertical electric slide 32 and the horizontal electric slide 31, the heating sheet 33 can move to any position of the heat-conducting silicone plate 35. After the heating sheet 33 generates heat, it can transfer the heat to the battery cell 2. The temperature sensor 30 on the battery cell 2 can detect the temperature data to simulate the heating state of the battery cell 2. Then, the main control unit 4 can drive the first electric slide 14 to drive the docking pipe 16 to move to one side of the corresponding connecting pipe 12 to achieve targeted liquid cooling and heat dissipation, so as to check whether the function is normal. When the function is abnormal, maintenance can be carried out in time to ensure that at any time, the battery cell 2 with a higher temperature can be preferentially cooled.

[0039] Preferably, the self-check mechanism further includes a liquid flow sensor 36. The liquid flow sensor 36 is arranged in the connecting pipe 12, and the main control unit 4 is electrically connected to the liquid flow sensor 36.

[0040] During self-check, the heating of the battery cell 2 will be simulated, the docking pipe 16 will move to one side of the corresponding connecting pipe 12 for docking, and the coolant will enter the connecting pipe 12. The liquid flow sensor 36 arranged in the connecting pipe 12 can detect whether there is coolant flowing in to judge whether the entire temperature detection, the movement of the docking pipe 16, and the liquid cooling system can all work normally and accurately.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery for improving the endurance of an electric vehicle, characterized in that: It includes a mounting plate, a battery cell, a protective shell, a liquid cooling system and a main control unit, the protective shell and the main control unit are both arranged on the bottom surface of the mounting plate, and the battery cells are arranged in an array inside the protective shell; the liquid cooling system includes a coolant storage tank, a liquid outlet pump, a liquid inlet pump, a U-shaped pipeline, a convergence pipe, a liquid return pipe, an insertion pipe, a connecting pipe, a solenoid valve, a first electric slide, a first telescopic pipe, a docking pipe and a docking mechanism, the coolant storage tank is arranged on the bottom surface of the mounting plate, the liquid outlet pump is arranged on the side wall opposite to the coolant storage tank, the liquid inlet pump is arranged on the side wall of the coolant storage tank facing the protective shell, the U-shaped pipeline is tightly attached to the inner wall of the protective shell and covers all the battery cells inside, both ends of the U-shaped pipeline extend out of the protective shell and are connected to the convergence pipe, and one end of the liquid return pipe is connected to the convergence pipe The other end is connected to the liquid inlet pump, the insertion tube is arranged in the protective shell and is located between different rows of battery cells, the insertion tube is connected to the U-shaped pipeline on both sides, the connecting pipe is arranged on the outer side wall of the protective shell, and its end extends into the protective shell and is connected to the U-shaped pipeline, the solenoid valve is arranged on the connecting pipe, the axis of the insertion tube coincides with the axis of the connecting pipe, the first electric slide is relatively arranged on the bottom surface of the mounting plate, the protective shell is located between the first electric slides, the docking pipe is arranged on the bottom surface of the mover of the first electric slide, the first telescopic tube connects the liquid outlet pump and the docking pipe, the connecting pipe is located on one side of the moving path of the docking pipe, and the docking mechanism is used to drive the docking pipe to dock with the connecting pipe; the main control unit is electrically connected to the liquid outlet pump, the liquid inlet pump, the solenoid valve, the first electric slide and the docking mechanism respectively; It also includes a self-inspection mechanism, which includes a transverse electric slide, a vertical electric slide and a heating plate. A accommodating cavity is arranged on the top surface of the mounting plate. The top of the protective shell is a thermally conductive silicone plate, and the thermally conductive silicone plate is located below the accommodating cavity. The vertical electric slide is relatively arranged on the side walls of the accommodating cavity. Both sides of the transverse electric slide are connected to the side walls of the mover of the vertical electric slide. The heating plate is arranged on the bottom surface of the mover of the transverse electric slide and contacts with the thermally conductive silicone plate. The main control unit is electrically connected to the transverse electric slide, the vertical electric slide and the heating plate respectively.

2. A battery for improving the endurance of an electric vehicle according to claim 1, characterized in that: The docking tube includes a fixed tube, a second telescopic tube and a movable tube, the docking mechanism includes a force plate and an electric push rod, the fixed tube is arranged on the bottom surface of the mover of the first electric slide, the first telescopic tube is connected to the fixed tube, the fixed tube, the second telescopic tube and the movable tube are connected in sequence, the force plate is arranged on the outer wall of the movable tube, the electric push rod is arranged on the bottom surface of the mover of the first electric slide, and its output shaft is connected to the side wall of the force plate, the outer wall diameter of the movable tube is smaller than the inner wall diameter of the connecting tube, and the main control unit is electrically connected to the electric push rod.

3. A battery for improving the endurance of an electric vehicle according to claim 2, characterized in that: The docking mechanism also includes an air pump, an air pipeline and an annular airbag. The air pump is arranged on the top surface of the moving tube, the annular airbag is arranged on the outer wall of the moving tube, the air pipeline connects the air pump and the annular airbag, and the main control unit is electrically connected to the air pump.

4. A battery for improving the endurance of an electric vehicle according to claim 3, characterized in that: The docking mechanism also includes an air release pipe and an air valve. The air release pipe is connected to the gas pipeline. The air valve is arranged on the air release pipe. The main control unit is electrically connected to the air valve.

5. A battery for improving the endurance of an electric vehicle according to claim 2, characterized in that: The docking mechanism also includes a transmitting tube and a receiving tube. The receiving tube is arranged on the side wall of the force-bearing plate away from the electric push rod. The transmitting tube is symmetrically arranged on the outer wall of the connecting tube and is located on one side of the moving path of the receiving tube. The main control unit is electrically connected to the transmitting tube and the receiving tube respectively.

6. A battery for improving the endurance of an electric vehicle according to claim 1, characterized in that: The liquid cooling system further comprises a heat exchanger, which is arranged on the bottom surface of the mounting plate, and the liquid return pipe is connected to the liquid inlet pump through the heat exchanger.

7. A battery for improving the endurance of an electric vehicle according to claim 1, characterized in that: It also includes a temperature sensor, which is arranged in the protective shell and located between the battery cells. The main control unit is electrically connected to the temperature sensor.

8. A battery for improving the endurance of an electric vehicle according to claim 1, characterized in that: The self-checking mechanism also includes a liquid flow sensor, which is arranged in the connecting pipe, and the main control unit is electrically connected to the liquid flow sensor.

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